When comparing Materialize vs ArtDesignUI, the Slant community recommends Materialize for most people. In the question“What are the best Bootstrap alternatives?”Materialize is ranked 3rd while ArtDesignUI is ranked 9th. The most important reason people chose Materialize is:

Pro

Device agnostic

Since Materialize follows Google's guidelines for Material design, which in theory is device agnostic, Materialize itself is device agnostic too. It's designed to look good on every device.

Pro

Great-looking demo

Pro

Mobile navigation

Pro

Responsive

Pro

Nice showcase of sites built with Materialize

Pro

Customizable

While the default style is not bad at all, Materialize also gives developers the ability to customize it and fit their own style, while still keeping in line with the Material Design philosophy.

Along with the CSS files, designers can also download the SASS files which can be edited and compiled.

Pro

12-Column Grid System

Pro

Included icon font

Pro

Meteor.js integration by developers

Pro

Opinionated

Material design is very opinionated on how design elements should behave and look. The basics of which revolve around certain visual elements (physics, space, momentum and light) which are used to create specific UX elements.

This is very helpful because it creates a consistent feel without making every design look the same. This can be seen in Materialize too, where each element may be customized but still it keeps the consistent look of the material design.